![]() In practice, this means using corresponding speakers and amps. The physics behind all this are pretty darn complex at times, so we’ll try and stay as practical and understandable as possible here! Now, lab coats on, and let’s get started.Ī guitar amp’s tube power amp works on the principle of matching impedance. These are just some of the questions we often get asked about tube amps, so let’s try and unravel some of the mysteries surrounding the murky world of impedance. ![]() ![]() Why does a “load” – that is, a loudspeaker – have to be connected?Ĭan I use a 4 ohm speaker with a 16 ohm output?Ĭan I run two cabs with different impedances in parallel? Referred to in English as Omega, Ω is the symbol of a unit of electrical resistance, and when you see it written on your all-tube amp, you’ll probably start asking questions like these ones: And it’s that universally recognised – but not usually understood – Greek letter, Ω, that causes confusion. This can give you more flexibility in finding a matching setup.Įvery guitarist who has stood in front of a tube amp wondering which speaker output it’s best to hook his or her cab (or cabs) up to has inevitably come face to face with Ohms. Some amps, like the one pictured, have multiple connections for speakers. One particularly important physicist for guitar players is the German Georg Simon Ohm (1789-1854), who gave the world of electricity the eponymous Ohm’s law. These things duly considered, it can be highly insightful for you to get to know the stories – and the theories – behind those names in a bit more detail. Hertz, Ohm, Volt, Ampere – these are all familiar names that belong in the basic vocabulary of any slightly technically-minded guitarist. Boring science is just something that would get in the way.Īnd yet, consider this: the everyday electric guitar player probably namechecks a bunch of famous physicists regularly, even though they might not be overly au fait with the scientific laws associated with these long-dead genii in white coats. ![]() Although you may have a vague idea of the different scientific phenomena that hide behind every note you play, your main focus as a player – quite naturally – is usually on the music itself, and the instrument. ![]() Most guitarists would probably not consider themselves experts when it comes to the subject of natural sciences. Here, we break the topic down into layman terms so you can rock on stage without having to worry about that troublesome little Ω symbol ever again! And chances are you’ve then had problems trying to understand the equipment’s various impedance levels, when really you should’ve been focusing on playing a great show instead. If you’re a gigging guitarist, chances are you’ve turned up at a show with your amp head and the hopes of using someone else’s cabs. ![]()
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